Uneven Print Color

Problem:

Ink metering system is out of adjustment or damaged.

Solution:

Check, adjust, repair or replace press components.

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Problem:

Uneven color appears across press.

1. Light to dark from roll parallel.
2. Streaks from grooved wiper roll.
3. Streaks from worn doctor blade.
4. Streaks from warped blade.
5. Streaks from damaged anilox roll.
6. Streaks from dirty anilox roll.
7. Streaks from low ink flow.

Solution:

Optimize colors across press by doing the following:

1. Parallel all anilox/metering rolls/blades.
2. Replace wiper roll.
3. Replace doctor blade.
4. Reduce blade pressure or replace blade.
5. Replace anilox roll.
6. Clean anilox roll.
7. Increase ink flow through/across press.